Depends on what you want to do. Establish a hypothetical question you want to get answered and then imagine a way to figure it out. You need to have basic background knowledge of population history so your models are guided (this gets crucial in nuance subtleties) and an understanding about the genetics of the source samples.How does one properly examine their coordinates via Vahaduo? What specifically should I be looking for and which populations? All I know is the Dinka/Israel_natufian strat to see your admixture.